A5000284794- Advancements in Battery Materials
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Binghamton University
2017-2024
Zhejiang University
2019
China University of Petroleum, Beijing
2018-2019
Institute of Process Engineering
2019
Ningbo Institute of Industrial Technology
2013-2017
Chinese Academy of Sciences
2013-2016
University of Nottingham Ningbo China
2014
China Jiliang University
2010-2013
RETURN TO ISSUEPREVViewpointNEXTWhat Limits the Capacity of Layered Oxide Cathodes in Lithium Batteries?Hui ZhouHui ZhouChemistry and Materials, State University New York at Binghamton, 13902-6000, United StatesMore by Hui Zhouhttp://orcid.org/0000-0001-8739-963X, Fengxia XinFengxia XinChemistry Xin, Ben PeiBen PeiChemistry Pei, M. Stanley Whittingham*M. WhittinghamChemistry States*E-mail: [email protected]More Whittinghamhttp://orcid.org/0000-0002-5039-9334Cite this: ACS Energy Lett. 2019,...
Tremendous efforts have been devoted to replace commercial graphite anode (372 mAh g−1) by group IV elements (Si, Ge, Sn) based-materials with high capacities in lithium-ion batteries (LIBs). The use of these materials is hampered the pulverization particles due volumetric change during lithiation and delithiation cycles, which leads destabilization solid electrolyte interphase (SEI) films. These problems result fast capacity fading low Coulombic efficiency. Nanostructured show significant...
Nickel-rich layered metal oxide LiNi1–y–zMnyCozO2 (1 – y z ≥ 0.8) materials are the most promising cathodes for next-generation lithium-ion batteries in electric vehicles. However, they lose more than 10% of their capacity on first cycle, and interfacial/structural instability causes fading. Coating substitution possible direct effective solutions to solve these challenges. In this Letter, Nb coating LiNi0.8Mn0.1Co0.1O2 (NMC811) is easily produced through a scalable wet chemistry method...
Abstract The ever-increasing energy density needs for the mass deployment of electric vehicles bring challenges to batteries. Graphitic carbon must be replaced with a higher-capacity material any significant advancement in storage capability. Sn-based materials are strong candidates as anode next-generation lithium-ion batteries due their higher volumetric capacity and relatively low working potential. However, volume change Sn upon Li insertion extraction process results rapid deterioration...
High-nickel layered oxides, such as NMC 811, are very attractive high energy density cathode materials. However, the nickel content creates a number of challenges, including surface reactivity and structural instability. Through wet chemistry method, Li-Nb-O coated substituted 811 was obtained in single step treatment. This treatment not only supplied protective coating but also optimized electrochemical behavior by Nb5+ incorporation into bulk structure. As result, 1st capacity loss...
The high nickel layered mixed metal oxides, such as LiNizCoyMn1–z-y–qAlqO2, are the most utilized cathode materials in Li-ion batteries for electric vehicles due to their energy density. However, content increases, they suffer from poor capacity retention and voltage fading interfacial/structural instability. In this paper, a series of Nb-coated/substituted LiNi0.9Co0.05Mn0.05O2 (NMC 9055) were synthesized by reacting Nb precursors, Ni0.9Co0.05Mn0.05(OH)2, LiOH. is found NMC structure also...
We presented a facile and large-scale approach for preparing micro-sized porous silicon by acid etching the abundant inexpensive metallurgical Fe–Si alloy as high-performance anode in LIBs.
The recently found intermetallic FeSn5 phase with defect structure Fe0.74Sn5 has shown promise as a high capacity anode for lithium-ion batteries (LIBs). theoretical is 929 mAh g–1 thanks to the Sn/Fe ratio. However, despite being an alloy, cycle life remains great challenge. Here, by combining nanospheres reduced graphene oxide (RGO) nanosheets, Fe0.74Sn5@RGO nanocomposite can achieve retention 3 times that of alone, after 100 charge/discharge cycles. Moreover, also displays its versatility...
Hollow silica–copper–carbon (H-SCC) nanocomposites are first synthesized using copper metal–organic frameworks as skeletons to form Cu-MOF@SiO<sub>2</sub> and then subjected heat treatment.
The same crystal structure, identical particle surface morphology and the similar size distribution of MSn<sub>5</sub> (M = Fe, Co FeCo) phases are ideal for comparison electrochemical performance, reaction mechanism, thermodynamics kinetics.
N-methyl-2-pyrrolidone (NMP) is the normally used solvent for cathode processing in lithium battery field. However, its high toxicity attracted more and environmental scrutiny was restricted by many chemical legislations industry applications. So, it necessary to find a greener safer alternative replace it. Dihydrolevoglucosenone (Cyrene), newly reported green dipolar aprotic solvent, has very similar properties as NMP, making attractive candidate. The possibility use Cyrene NMP NMC 811...
Highly lithium electroactive hierarchical boron-doped rutile submicrosphere TiO<sub>2</sub> was synthesized by a facile solvothermal method and successfully employed as an anode material for lithium-ion batteries.
ε- and β-LiVOPO4 were synthesized from the same precursor at different temperatures in an air atmosphere. ε-LiVOPO4 is obtained 400 700 °C. The °C sample has better purity crystallinity, but a little electrochemical performance due to its smaller particle size conducting carbon residue sample. formed between above two temperatures, which gives slightly lower capacity than that of sample, indicating higher kinetics lithium reaction for ε phase those β one. transformation then back reversibly...
Sn-based alloy materials are strong candidates to replace graphitic carbon as the anode for next generation lithium-ion batteries because of their much higher gravimetric and volumetric capacity. A series nanosize Sn y Fe alloys derived from chemical transformation preformed nanoparticles templates have been synthesized characterized. An optimized Sn5Fe/Sn2Fe with a core-shell structure delivered 541 mAh·g-1 after 200 cycles at C/2 rate, retaining close 100% initial Its capacity is double...
Surface coating is commonly employed by industries to improve the cycling and thermal stability of high-nickel (Ni) transition metal (TM) layered cathodes for their practical use in lithium-ion batteries. Niobium (Nb) or substitution has been shown be effective stabilizing LiNi0.8Mn0.1Co0.1O2 (NMC811) cathodes; addition, electrochemical performance final products varies depending on postprocessing. In this follow-up study, we situ synchrotron X-ray diffraction investigate kinetic processes...
Cubic-to-hexagonal phase evolution, narrow crystalline size distribution and enhancement of luminescence are simultaneously achieved by modifying the ratio SiO2/B2O3 content in Eu3+-doped oxyfluoride borosilicate glass ceramics containing NaGdF4 nanocrystals. The mechanisms evolution nanocrystals discussed on basis IR spectra, viscosity, XRD TEM data. results indicate that stresses developed during thermal treatment process play an important role which provides experimental evidence...
3D GeO<italic>x</italic>/MWCNTs composite spheres as anode exhibited high rate capability and long-life performances with areal loading for lithium ion batteries.
Nickel-rich layered oxides, such as LiNi 0.8 Mn 0.1 Co O 2 (NMC 811), are considered one of the most promising candidates for next-generation cathode because their high energy densities and relatively low cost. However, poor first Coulombic efficiency NMC 811 leads to around a 15% capacity loss in cycle at cut-off voltage 4.4 V. Moreover, structure degradation during cycling results fading safety concerns, due potential oxygen after charging. Here, with aluminum substitution manganese...